Hoisting device.



PATENTED JUNE 13, 1905.

M. SCHILLER.

HOISTING DEVICE.

APPLICATION FILED AUG. 3, 1904.

3 SHEETS-SHEETI.

PATENTED JUNE 13, 1905.

M. SCHILLER.

HOISTING DEVICE.

APPLIOATION FILED AUG. 3, 1904.

8 SHEETS-SHEET 2'.

v 6 I fly m f' a fly)? WITNESSES.-

PATENTED JUNE 18, 1905. M. SCHILLER.

HOISTING DEVICE.

APPLICATION FILED AUG. 3, 1904.

3 SHEETS-SHEET 3.

UNITED STATES Patented June 13 1905 PATENT EEIcE.

MICHAEL SCHILLER, OF NUREMBERG, GERMANY, ASSIGNOR TO SIEMENS- SCHUCKERT-IVERKE, G. M. B. H., OF BERLIN, GERMANY.

HOISTING DEVICE.

SPECIFICATION forming part of Letters Patent No. 792,463, dated June 13, 1905.

Application filed August 3,1904. Serial No. 219,374.

To all whont it may concern.-

Be it known that I, MICHAEL SCHILLER, electrical engineer, a subject of the King of Bavaria, residing at Nuremberg, Bavaria, Germany, have invented certain new and useful Improvements in Hoisting Devices, which are described in the following specification.

The arrangement heretofore known and generally used for arc-lamps consists of drum devices, two-of such drums being placed adjacent to each other and first simultaneously operated, then one alone, thus allowing movement of the lamp laterally and then vertically, and vice versa. In this arrangement each of the drums is provided with a ratchet pawl and wheel for controlling its motion. The objection to this arrangement is that in case of carelessness either pawl may be released without its drum being held by the operating-crank, allowing the lamp to drop down and causing liability of damage to the lamp itself and considerable danger topassers-by. In order to prevent this, I have provided an automatic locking device hereinafter described, and shown in the accompanying drawings, in which Figures 1 to 4 show the different positions of the lamp in connection with the drums. Figs. 5 and 6 are detail views of the drums in coupled and uncoupled position, respectively.

a and b are the two drums, Z) being provided with a ratchet-wheel and a pinion, a with a pinion only. The drum 6 may be arrested by a pawl 0. The shaft of the upper drum (6 is stationarily journaled, the one of the lower drum being vertically adjustable by means of an eccentric (Z, Figs. 5 and 6, so as to bring the pinions on the two shafts into or out of mesh, thus coupling or uncoupling the two drums. The eccentric (Z operates the movable journal of the lower drum by means of the plate or bar The bar 7 is provided at its upper end with the journal-bearing for the lower drum 6, and this bearing is guided in the slotted plate Z. The journal of the lower drumt has also fitting around it the lower end of the plate or bar which carries at its upper end the lug h for locking the upper drum when the two pinions are disengaged.

The bar or plate 9 is guided by means of two 5 0 guiding-posts m and 42 which are secured to the main frame of the machine by any suitable means. It will thus be seen that as the eccentric (Z is turned through an angle of one hundred and eighty degrees for the purpose of engaging or disengaging the pinion the plate 70 will swing laterally independently of the plate g, whereas the plate Q will have only a movement in a vertical direction.

By turning drum Z to the right by means of a suitable crank (not shown) the rope e is wound upon its drum 6, While simultaneously the other rope f is unwound from drum (0. Consequently the lamp moves laterally or horizontally in the direction indicated by ar- 5 row in Fig. 1. Then the eccentric cl may be turned one hundred and eighty degrees, dis engaging the two drums and simultaneously by the projection h of the eccentric guide-rod 9 locking drum a. The same crank (which is not shown in the drawings) may be used for turning either drum 6 or eccentric (Z. On rotating drum 6 in opposite direction after disengaging pawl c the lamp will be lowered. (See Fig. 2.) The reversal of these operations will at first hoist the lamp, Fig. 3, and after turning the eccentric (Z, and thereby coupling the drums a and b, will horizontally move it to the desired position.

I want it to be understood that I do not limit myself to the specific details shown in the annexed illustrations. There may be employed other details of construction to carry out the object of my inventionviz., to lock one of the hoisting-drums by the disengage- 5 ment of the two. I

Having thus described my invention, what I claim, and desire to secure by Letters Patent,

1. The combination with a pair of drums 9 each of which is provided with a pinion adapted to mesh with that of the other, a stationary journal-bearing for one of said drums, and a movable journal-bearing for the other of said drums; of a slotted guide-plate for said movable journal-bearing, means for causing said movable journal-bearing to move in said slotted guide-plate whereby the said pinions are moved into and out of engagement with each other, a dog fulcrumed on a stationary fulcrum for retaining one of said drums, and a lug operated by the means for moving said movable journal-bearing for retaining the other drum when the pinions are disengaged. v

2. In a mechanism of the character described having a pair of drums, a ratchet-wheel and pawl fox-one of these drums and a pinion con nected with each of the same and in mesh with each other, an eccentric for shifting one of said drums so as to disengage said pinions, an eccentric-rod attached to said eccentric and holding said drum, and a projection on said eccentric-rod locking the other drum simultaneously with the disengagement, substantially as set forth.

3. In a mechanism of the character described having two hoisting-drums, pinions connected with each of these drums and in mesh with each other, means for disengaging these pinions, and additional means controlled thereby for locking one of said drums on such disengagement, substantially as set forth.

4:. Inamechanism of the character described having two hoisting-drums, a pinion connected with each of these drums, and in mesh with each other, means for shifting one of these drums so as to disengage said pinions, and a projection actuated by such disengagement locking the other drum, substantially as set forth.

5. In a mechanism of the character described having two hoisting-drums, a pinion connected with each of these drums and in mesh with each other, an eccentric for shifting one of said drums so as to disengage said pinions, and a projection simultaneously actuated by said eccentric for locking the other drum, substantially as set forth.

6. In a mechanism ofthe character described having two hoisting-drums, a ratchet-wheel and pawl for one of these drums and a pinion connected with each of the same and in mesh with each other, an eccentric for shifting one of said drums so as to disengage said pinions, an eccentric-rod attached tosaid eccentric and holding said drum, and a projection on said eccentric-rod locking the other drum simultaneously with the disengagement, substantially as set forth.

MICHAEL SCHILLER.

Witnesses:

A. KNITTELIN, C. H. PETERS. 

